Update compound worlds on the fly

src/main/java/com/volmit/iris/generator/IrisEngineCompound.java

@@ -35,7 +35,7 @@ import java.util.concurrent.CompletableFuture;
 
 public class IrisEngineCompound implements EngineCompound {
     @Getter
-    private final World world;
+    private World world;
 
     private final AtomicRollingSequence wallClock;
 
@@ -361,6 +361,11 @@ public class IrisEngineCompound implements EngineCompound {
         return defaultEngine;
     }
 
+    @Override
+    public void updateWorld(World world) {
+        this.world = world;
+    }
+
     @Override
     public void hotload() {
         for(int i = 0; i < getSize(); i++)